I have object (not array) with key and value:
const obj = {
1: { id: 1, name: 'name', ...},
2: { id: 2, name: 'name', ...},
3: { id: 3, name: 'name', ...},
4: { id: 4, name: 'name', ...},
5: { id: 5, name: 'name', ...},
6: { id: 6, name: 'name', ...},
}
How I get the first 3 elements of this object in javascript?
For example I want to get 3 the object I expect is (with key and value):
const obj = {
1: { id: 1, name: 'name', ...},
2: { id: 2, name: 'name', ...},
3: { id: 3, name: 'name', ...},
}
You can use Object.entries and slice it and then convert it back to an object using Object.fromEntries
const obj = {
1: { id: 1, name: 'name'},
2: { id: 2, name: 'name'},
3: { id: 3, name: 'name'},
4: { id: 4, name: 'name'},
5: { id: 5, name: 'name'},
6: { id: 6, name: 'name'},
}
let sliced = Object.fromEntries(Object.entries(obj).slice(0,3))
console.log(sliced)You could use JavaScript for...in loop as the code below:
const obj = {
1: { id: 1, name: 'name'},
2: { id: 2, name: 'name'},
3: { id: 3, name: 'name'},
4: { id: 4, name: 'name'},
5: { id: 5, name: 'name'},
6: { id: 6, name: 'name'},
};
const newObj = {};
let maxCount = 3; /* define the number of elements you want to get from original object here */
let count = 0;
for (let item in obj) {
newObj[item] = obj[item];
count++;
if(count>=maxCount) {
break;
}
}
console.log(newObj);const result = Object.values(obj).slice(0, 3);